Anatole mallet



7 (No Model.) 2 Sheets-Sheet 1.

A. M-ALLET.

LOGOMQTIVE FOR SINGLE RAIL RAILWAYS. No. 399,679. P htented Mar. 19, 1889.

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(No Model.) 2 Sheets-Sheet 2.

A. MALLETE LOGOMOT-IVB FOR SINGLE RAIL RAILWAYS.

No. 399,679. Patented Mar. 19, 1889.

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ANATOLE MALLET, OF PARIS, FRANCE.

LOCOMOTIVE FOR SINGLE-RAIL RAELWAYS.

SPECIFICATION forming part of Letters Patent No. 399,679, dated March 19, 1889,

Application filed July 27, 1886. Serial No. 209,245. (No model.) Patented in England June 10, 1886, No. 7,81%

To all whom it may concern:

Be it known that I, ANATOLE MALLET, a citizen of Switzerland, residing at Paris, in the Republic of France, have invented anew and useful Locomotive for Single-Rail Elevated Railways, (for which I obtain ed Letters Patent of Great Britain, dated June 10, 1.886, No. 7,810,) of which the following is a specification.

This invention relates to the construction and arrangement of a locomotive for a railway having a single elevated rail on which run vehicles suspended on each side of it like panniers from a wheeled framing above. Lo-

'comotives for moving trains on such a railway have to be specially arranged in order to insure equilibrium and to provide for running on the rapid curves of which railways of this kind admit.

Figure 1 is a side View, and Fig. 2 is an end View, of a locomotive according to this invention. Fig. 3 is a plan, partly in section, showing a pair of coupled driving-wheels.

The locomotive (shown in Figs. 1 and 2) has two boilers, B, one on each side of the rail R, connected together by a strong framing, and having their steam-chests communicating by a cross-pipe, 1). Under the barrels of the boilers are fixed watertanks E, the weight of which, with their contents, tends to keep the center of gravity low. To insure steadiness, rollers g are arranged to .run along the guiderails G, which are fixed on the standards F, that support the rail R. The engine-cylinders 0, one on each side of the rails, have their pistons linked to cranks on the axle of a driving-wheel, IV, and this axle may be coupled, as shown in Fig. 3, to another driving-axle, so that there are two driving-wheels, WV W, acting simultaneously on the rail R.

As the axles A .A are coupled by side rods linked to their cranks, they must always re main parallel. One of the wheels, \V, is therefore so mounted on the axle A that it can accommodate itself to the curvature of the rail. For this purpose it is made with a hollow hub with internal sph erical surfaces fitting a spherical boss, N, which is free to slide along the axle A, but revolves with it. From the boss N two round studs, a, project into dovetail recesses formed within the hub of the wheel, free to slide to and fro in these recesses. The hub of WV has at each side a projecting journal, j, and these journals revolve in the eyes of a fork, F, a slotted hole of which engages on a perch-pin, P, projecting from the framing of the locomotive. Thus, according as the rail R is curved,the wheel WVQwhilc it i s caused to revolve with the driven axle A by means of the studs 07., is free to swing with the fork F from side to side, the boss N moving to and fro along the axle A. i

Having thus described the nature of my invention and the best means I know for carrying the same into practical effect, I claim 1. The combination, with the single supporting-rail R of a single-rail elevated railway, of a locomotive having a pair of supporting-wheels in line upon the upper side of said rail, and provided with a boiler, B, and water-tank E at each side, all of which depend below the wheel-supporting rail at opposite sides thereof and serve to keep the center of gravity low, a pair of cylinders, C, at opposite sides of the rail working one of the support ing-wheels, and connections between. the latter and the other supporting-wheel, substantially as described.

2. The combination, with the single supportingrail R and side rails, G, below the same of a single-rail elevated railway, of a locomotive having a pair of sup tiorting-wheels in line upon the upper side of said rail, and provided at each side with a boiler, B, and water-tank E, all of which depend below the wheel-supportin g rail at opposite sides of the side rails to keep the center of gravity low, a pair of cylinders, 7, at opposite sides of the rails working one of the supporting-wheels, connections between the latter and the other supporting-wheel, and the side wheels, 9 g, bearing against the opposite rails G below the supporting-rail R, substantially as described.

3. The combination, with the single supporting-rail R of a single-rail elevated railway, of a locomotive having at each side a depending boiler, 13, and water-tank E, all of which hang below said rail, two wheels, W W, arranged in line on the rail, the axles A A, carrying the wheels, the cylinders G at opposite sides of the rail driving one of the axles, and connections between the latter and the other axle, said axle A having a spherical boss, N, rotating but sliding with it, and the wheel NV having a hollow hub provided with internal spherical surfaces fitting the boss and rotating and sliding with the latter, sub stantially as described.

4. A locomotive for a single-rail elevated railway, consisting of a depending boiler, B, and water-tank E at each side, a pair of side cylinders, C, an axle, A, having a supporting- Wheel, NV, and driven by the cylinder-pistons, an axle, A, connected with and driven by the other axle, and having the boss N rotating but sliding with it and provided with studs n, and the supportingwheel W, having a hollow hub provided With internal spherical surfaces fitting the boss, substantially as described.

5. A locomotive for a single-track elevated railway, comprising a depending boiler, B, and water-tank E at each side, a pair of side cylinders, O, a shaft, A, carrying a supporting-Wheel, W, and driven by the cylinder-pistons, a shaft, A, driven by the other shaft and having a spherical boss, N, sliding on it, and provided with studs n, the supportingwheel W, having a hollow hub and rotating and sliding with the boss, and the swinging fork F, having eyes in which journals on the Wheel revolve, substantially as described.

In testimony whereof I have signed my name I to this specification, in the presence of two subscribing Witnesses, this 15th day of July, A. D. 188 6.

A. MALLET. 

